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About Radioactive's problem:

If you selected both "Resize images" and "Show Image Samples", although you can't resize the sample image as before, you can use "View Larger Version" instead - it's much bigger than sample and has no resizing.

But - if you just selected the option "resize image" but not "Show Image Samples", you'll catch the problem like Radioactive -you can only get a resized one, if you try to click 'View larger version', it will do nothing.